In a time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together.He also asked the architect that at least one of his castle should be protected with walls.The architect could not come up with any solution that served all of King’s choice, but he suggested the best plan that you can see in the picture.Can you find a better solution to serve the king’s demand?
If you see the solution picture, you will find out that two castles are protected with walls in this formation.
